<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style type="text/css">
        .box {
            font-size: 50px;
            /* color: teal; */
        }
        
        div.box {
            color: teal;
        }
        
        #miss {
            color: yellowgreen;
        }
        
        div#miss {
            width: 400px;
            height: 300px;
            background-color: blueviolet;
        }
    </style>
</head>

<body>
    <div class="box">嗷呜嗷呜</div>
    <p class="box">汪汪汪</p>
    <div id="miss">喵喵喵</div>
</body>

</html>